Propaganda in china is rather complex, there are many departments and strategies involved in how China uses propaganda to influence it population and its views towards the regime and towards the rest of the world. Departments involved include some for literature, newspapers, magazines, textbooks, electronic communication, fiber optic cables that transmit communication, satellites, Television, Art, Military Propaganda for internal affairs, publishing, amongst other departments.
All of these work together to spread the regimes intent. However, it isn’t done in such a way as the regime says “this is what you’ll report/publish etc.” but more along the lines of the regime dropping hints on what might need to be emphasized in the media.
This doesn’t always work quite well though, as the media might hear one thing from the government, think its actually what needs to be reported on more, and then potentially make a bigger deal out of it than was previously thought necessary by the government. For example, a government official might state something about how they are expanding a bit of control over the south china sea, but then the news outlet might report it as China is maintaining control of the South China Sea and will valiantly defend its territorial rights from imposters (the USA to name one). This then can overly publicize or incentivize a government in the wrong direction, so in short, the Chinese government has to be careful not to allow an overzealous media take what the government says, and say what they think the government would like even more.
Its all very complex, but media and constant control in propaganda is crucial to the Chinese central government and CCP maintaining control within the country.